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    <title>Document</title>
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<body>
    <script>
        let arr = ['张飞', '赵云', '黄忠', '吕布', '马超', '刘备', '曹操'];
        let random = Math.floor(Math.random() * (arr.length));
        document.write(arr[random]);
        // splice(起始位置(下标),删除几个元素)
        arr.splice(random, 1);
        console.log(arr);
    </script>
</body>

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